Component overlapping in a form

Hello,

A simple form with lots of textxfields, simplecombo,datefield work perfectly alone as a single layout/form application. But date field and simple combobox overlaps on the next below components when I integrated the layout/form in one of the sides in broderlayout. If I use setHighet api, then overlapping problem goes, but form looks very odd and asymetrical. It would be really great if you can help me.